Built everything needed to run a fsck when a remote gets connected. Have not tested it; only testing is blocking merging the incrementalfsck branch now.

Also updated the OSX and Android builds to use a new gpg release (denial of service security fix), and updated the Debian backport, and did a small amount of bug fixing. I need to do several more days of bug fixing once I get this incremental fsck feature wrapped up before moving on to recovery of corrupt git repositories.